The First Step is to Start

You probably don’t even know what skills you need, so don’t worry about it. Start with what you already know. — 37signals

37signals is a company based in Chicago with Jason Fried and David Heinemeier Hansson. I strongly recommend their book Rework with quick tips to success in business. It is very straight forward and very clear, touching all of the important fields you need to tackle within a company.